158 



BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



Adult female. —Length (sldns), 157-177 (166); wing, 107-116 

 (111.9); tail, 64.5-74 (68.4); exposed culmen, 12-14.5 (13.1); tarsus, 

 21.5-23.5 (22.3); middle toe, 14.5-16 (15).« 



Mountain districts of western North America; north to Mackenzie 

 (Fort Franklin, Great Slave I.iake) and Yukon Territory (near Miles 

 Canon, Lake Lebarge, Fifty-Mile River, etc.) ; breeding southward to 

 higher mountains of New Mexico (wSan Miguel County; Santa Fe), 

 and Arizona (San Francisco and Mogollon mountains) , and Chihuahua 

 (Pacheco), eastward to eastern Wyoming (Black Hills) and north- 

 western Texas,'' westward to the Sierra Nevada and Cascade ranges; 

 in winter, southward to southern California (Los Angeles County, etc.) 

 Guadalupe Island, Lower California, northern Sonora (Espia; Nacory ; 

 PachicaO and northwestern Chihuahua — probably also to northern 

 Coahuila and Nuevo Leon; eastward (more or less irregularly) over 

 nearly the whole of Texas (south to Laredo, east to Corpus Christi), 

 Indian Territory (Beaver Creek, October, November), Kansas (Ellis; 

 Lawrence; Neosho Falls; Baldwin City), and South Dakota (Corral 

 Draw, Pine Ridge Reservation, May 17). 



Erythacu {Sialia) arctica Swainson, Fauna Bor.-Am., ii, 1831,209 (Fort Franklin, 

 Mackenzie, lat. 05°). 



Sialia arctica Swainson, Fauna Bor.-Am., ii, 1831, pi. 39. — Nutiwll, Man. Urn., 

 U. S. and Can., ii, 1834, 573; 2d ed., i, 1840, 514.— Ornithological Com- 

 mittee, Journ. Ac. Nat. Sci. Phila., vii, 1837, 193 (Culumbia R.). — Bona- 

 parte, Geog. and Comp. List., 1838, IG; Consp. Av., i, 1850, 298. — Audubon, 

 Synopsis, 1839, 84; Birds Am., oct. ed., ii, 1841, 17G, pi. 136.— Gambel, 

 Proc. Ac. Nat. 8ci. Phila., iii, 1846, 113 (n. provinces of Mexico); Journ. Ac. 

 Nat. Sci. Phila., i, 1847, 37.— McCall, Proc. Ac. Nat. Sci. Phila., v, 1851, 215 

 (Texas).— Heermann, Proc. Ac. Nat. Sci. Phila., ii, 1851, 264 (San Diego, 

 California, Feb.); Rep. Pacific R. R. Surv., x, 1859, 44 (Santa Fe, New 

 Mexico, l)reeding). — Woodhouse, in Rep. Sitgreaves' Expl. Zuiii and Col. 

 R., 1853, 68 (Santa Fe, New Mexico, breeding).— Henry, Proc. Ac. Nat. Sci. 

 Phila., vii, 1855, 310 (New Mexico).— Ba\rd, Rep. Pacific R. R. Surv., ix, 



a Fifteen specimens. 



Specimens from the Pacific coast district compare in average measurements with 

 those from the Rocky Mountain districts as follows: 



& According to Dresser, Ibis, 1865, 476, who cNcn states that the species breeds in 

 central Texas, 



